作者:Klaus Burger、Stefan Penninger、Monika Greisel、Ewald Daltrozzo
DOI:10.1016/s0022-1139(00)85154-4
日期:1980.1
hyl)-5,6-dihydro-2H-1,3,5-oxadiazines 3 on thermolysis undergo a retro Diels Alder reaction. On elimination of hexafluoroacetone 2 4,4-bis(trifluoromethyl)-1,3-diazabuta-1,3-dienes are formed, which are transformed into 4,4-bis(trifluoromethyl)-3,4-dihydro-quinazolines 6, 4,4-bis(trifluoromethyl)-1,4-dihydro-1,3,5-triazines 11, and hexahydro-1,3,5-triazines 20, respectively, depending on the substituents
在热解后的2,2,6,6-四(三氟甲基)-5,6-二氢-2H-1,3,5-恶二嗪3进行逆Diels Alder反应。消除六氟丙酮2时,形成4,4-双(三氟甲基)-1,3-二氮杂丁-1,3-二烯,将其转化为4,4-双(三氟甲基)-3,4-二氢喹唑啉6,取决于存在于杂二烯骨架上的取代基,分别为4,4-双(三氟甲基)-1,4-二氢-1,3,5-三嗪11和六氢-1,3,5-三嗪20。